Spark-arrester.



A. LAKE.

SPARK ARRESTER.

APPLICATION FILED MAR. I8, I9I6. y

' Patented Feb. 6,1917...

2 sH'EETssHEET i.

III! III A.LAKE.l SPARK'ARRESTER. APPLICATION FILED MAR. 1B. 1916.

mmm Feb. 6,1917.

2 SHEETS-SH'EET 2.

f En sTnTEs PATENT onirica.

ABGHIBALD LAKE, F AEKLAND,^ALBERTA, CANADA.'-v

sPAnK-AnnEsTEn.

Specification of Letters Patent.

, I Patent-.cansa 6,1917.

Application led March 18, 1916. Serial No. 85,219'.

To all whom it may concern:` Be it known .that I, ARCHIBALD LAKE, a subject of the King of Great Britain, resid- -ing at Parkland, in the Province of Alberta' 'and Dominion of Canada, have invented Vnew andA useful Improvements in Sparkthe blades.

Arrestersfof which the following is a speci'- `iication.

. This `invention relates to spark arres'tersv and has for its chief characteristic` to provide a device of this character which is so constructed and arranged upon a stack as to utilize the draft created in the stack to imcinders from one blade to the cinder catching means formed on the adjacent blade.

Another important object of this inven- 4 tion is to provide a device ofthe character described in which the blades are perforated 4to allow the percolatio 'of the smoke and steam therethrough an at the same time catchin the cinders and preventing them from being ejected from the smoke stack.

nother important object of the invention is to provide a device of this character which may be quickly appliedvto or detached from a stack of any common construction.

Other objects of the invention will appear as the specication is read in connection with the accompanying drawings.

Figure 1 is a vertical section of mydevice showing the `same appliedto a stack and showing the blades in elevation.

Fig. 2 is a top plan view of the arrester.

Fig. 3 is a section of one of the modified forms ofthe hlades.`

Fig. 4: is a fragmentary perspective of a further modified form of a blade.

Fig. 5 is an end elevation of a still further- 4modified form of blade.

6 is a modified form of my invention .applied to`a 1stack, the 'stack and cinder receptacle being shown in section, while the blades are shown in elevation.

Fig. 7 is a horizontal section on the line 7-7 of Fig. 6.

Referring to the drawings in detail 1 the balls i2'.`

Vis threaded'to receive a nut 1 3 whereby the designates the stack lA of a locomotive, I having `shown my device applied thereto for the sake of, illustration, as I wish it to be understood that -my spark arrester maybe/ttl` used in connection witha furnace of any de.

scription without departing from the scope of my invention. The stack Alias its upper 1 edge outturned to provide anann'il-ar bead 1. Mounted upon the stack Al is my improved form of spark arrester whichcomprises a cinder receptacle B which is oan'- nular formation and comprises .diverging being secured together in any .suitable manf ner to tangentially arranged outlet pi'pef 4: to allow walls l2' and 3, the outer edges of the walls/ .7o. rovide an annular pocket 4. The

lower divergingwall' 3 is provided with a the exit. of the cinders as will be hereinafter i described.A ARivetedto the inner -alcefof vlower diverging wall 3 adjacentits lower edge is an annular lring -which extends above and below the free edge of the diverging'wall 3 and has its upper edge bead- -ed as at 6, the 4upper edge being disposed within the pocket 4 as is clearly shown in the drawings. Riveted to the inner face .of the'ring 5 and spanning the space therebetween are a pair of cross bars 7 which'intersect eachother at a vpoint concentrically'.

of the ring. As .shown in Fig. 1 the opposite extremities of the cross bars'7 lie upon the beaded edge 1 of the stack A and support thereceptacle thereupon as will bev clearly understood. To rigidly hold the re ceptacle upon the stack I have provided the annular ring 5 with bolts 7 adjacent its lower edge, the bolts extending transversely through the ring and having their inner extremities engaging theunder side of the bead 1. Secured to the top divergig wallA 2 of the receptacle and spanning the ,space therebetween is a second pair of cross bars 8 which intersect each other in a manner similar to the cross bars 7 sothat the intersection ofboth ofthe cross bars 7 and 8 lie in vertical alin'ement with each other. Connectin the crosslbars 7 and 8 andvextending throug the same at their points of intersec tion isa shaft-9 the upper end of which 1s provided with a head 10.' f The inner face of the head ,.'10fislprovided with an annular groove v'v'hich'y is adapted to coperate with the upper cross bar Sto form a raceway for The lower end of the shaft 9 shaftnwill be held in assembled position upon the cross bars. Mounted upon the shaft is a sleeve 14 which has its lower edge enlarged and provided with an annular groove 15, the same coperating with'the upper cross bar 7 and forming a raceway for the balls 17. The-sleeve 14 is formed adjacent its upper end with a plurality of radially extending arms 18, the arms being slotted vertically for a portion of their length to receive `the vertical portion of the blades 19, the blades being rigidly mounted within the arms by' means of the rivets 20.

The rigidly lextending blades 19 .are of such a length as to have-theirfouter-,ends terminate .at a point on a line with the inner edge of the upper converging wall 2, and'v are of such a width as to permit the free rotation of the same Within 'opening formed in the. annular receptacle. The. blades as shown in Fig. 1 hav-e a major portion of their width inclined at an angle as at 21, while the upper edge of the blade is bent longitudinally to form a groove 22, the groove being substantially semi-circular in cross section and having its mouth disposed downwardly. The vertical portion 23 of each of the blades is perforated as at 24 to permit the percolation of the smoke and steam as will be hereinafter described.

In practice when the exhaust of the locomotive which comprisesa certain amount of steam and smoke and cinders passes up through the stack A, it strikes the inclined/ portion 21 of the blades 19 whereby the lblades will be caused to rotate as will be understood.- N ow'assuming that the exhaust has impinged upon the angular portions of the blades, the exhaust will be deflected to the succeeding blade, whereby the exhaust Vwill percolate through the perforations [in the succeeding blade and pass out through' the opening in the. receptacle B. As the exhaust passes through the perforations, the longitudinal extending grooves 22 formed4 on the upper edge of the blades will collect the cinders contained in the exhaust and by the centrifugal action created by the rotating of the blades the cinders will move rafl dially within the groovesand will/be deposited in the receptacle B, the .annular ring 5- preventing the cinders from returning vwithin the stack. 'As the blades 19 are rotating with great impetus, a draft will be .created within the pocket4 whereby'the cinders within the pocket will4 be ejected through the outlet pipeC. A ilexible pipe of any4 suitable construction may be connected to the outlet pipe C whereby the cinders will `be conveyed to the ground.

In Fig. 3 is shown al slightly modified form of the blade, the vertical portion of the blade being corrugzted as at 25, the corrugations serving to form a greater obstruction for the exhaust-and. to direct the cin-l ders upwardly within the. groove 22.l In

Fig. 4l the corrugated `portion ofthe vblade is' perforated as at 26 to allow the percolation of the exhaust therethrough. In Fig.-

lblade is so curved as to direct the cinders the groove depending flange 31l at a point adjacent the inner edge. Riveted to the upturned flange 30 is an annular sleeve 32 which has a major portion of itsvwidth disposed below the receptacle, the remaining portion extending into the receptacle and having its upper edge provided with an .annular bead as at 33. As shown in the drawing, the annular sleeve 32 extends into thestaclr for a considerable distance,'the lower edge of the lower diverging wall 29 limiting the outward movement thereof,while the' bolts 34 .carried by the depending flange 30 engage the bead formed on the upper ledge of the stack A and prevents the accidental displacement of the arrester. 35 designates the shaft which has its opposite ends journaled in the cross bars 436 in a manner similar to that shown in Fig. 1,. the lower .pair of Vcross bars being secured to the inner face of the annular-sleeve 32. The shaft 35 is/ignounted in ball bearings as in Fig. 1 and therefore it is thought unnecessary to describe the mounting in detail. Mounted upon the shaft 35 is an annular sleeve 37 upon which is formed a plurality of spiral blades 38,'v

the upper portion of each' ofthe bladesbeing arranged .vertically as at 39'and are provided with a longitudinally extending groove 40. I

.It will be seen from this construction that the operation of the arrester iS Similar to that describedin my preferred form with the exception that the spiral blades divide the exhaust from'the locomoti e into l-aseries ofcolumns, the blades' bei, g so shaped' inge upon as to cause these columns to the verticalportion 39 of the hxan es whereby the cinders contained inthe: exhaust will collect within the 'groove 4.0.and will 'move radially within the grooves' and will ultimately be disposed in the cinder receptacle' D. From the receptacle `D the cinders will be forced by the draft created from the rolio ' connection with "device Will 'be' minor "changes in size, shape, proportionand f minor' details of construction may be made Without departing from the spirit and scope of the hereuntoappended claims.

. What I Aclaim 1sr l 1. In combination with a rotatablyinounted on the shaft, the said blades each having a portion thereof inclined, a groove formed on the blade, and a vertical portion connectingI the groove to the inclined portion.

In combination With'a stack, a shaft mounted concentricallyin the stack, blades rotatablymountedon the shaft, said blades l each having aportion thereof'inclined, a

' groove formed e corrugated on the blade, anda vertical portion connecting the groove and the inclined portion.

3. In combination with a stack, a shaft ounted concentrically in the stack, blades rotatably mounted on the shaft, said blades :fach having a portion Ithereof inclined, a groove formed .on the blade, and a vertical perforated 'corrugated p'ortionconnecting the groove and the inclined portion.

Copies of thisJpatent/may be obtained for five-cents each, by addressing the into and out of the outstack, a shaft" mounted concentrically' in the stack, blades fr. In combination With a stack, a shaft vmounted concentrically in the stack, blades rotatablv mounted on the shaft,'a receptacle lsurrounding said blades, each of saidblades havingl a portion thereof inclined, a groove formed on the blades and a vvertical perfo-- rated portionconnecting the groove and the inclined portion. v

5. Ineombination with a stack, aspark arrester comprising an annular receptacle having diverging top and bottom Walls, an annulus secured 4to the inner edge of the bottom Wall and cooperating?,P with said bottom wall to form a cinder receiving chamber, cross bars spanning said receptacle and ar-` ranged upon the opposite sides thereof,- the bars upon the .lower side ofthe-receptacle adapted to engage the stack to limit the downwardv movement of the receptacle, securing members carried by said annnlus, a shaft mounted in said cross bars and con nectingA the same, and blades rotatably mounted on said shaft, said blades veach having a portion thereof inclined and a groove formed on the blade, and a vertical portion connecting the .groove to the inclined portion.

in testimony whereof I aiiX in presence of two witnesses.y

ARCHIBALD LAKE.

my signature Witnesses;

WILLIAM HUME LINToN, ALFRED L. Rnnvn,`

Washington Z). C. 

